Burner grid and process of making the same



' Sept.

v F. V. RISINGER BURNER GRID AND PROCESS OF MAKING THE SAME Fil ed cm. '13, 1925 2 Sheets-Sheet 1 I I HHHIHI HHHHIIIIHIUIH H PM lUlHll Fig. 5. I

k gwunfo r,

I. Vflisirger Sept. 13, 1927.

F. v RISINGER BURNER GRID AND PROCESS OF MAKING THE SAME Filed Oct. 13, 1925 2 Shets-Sheet 2 v gwuenliop 4 1". rzlz s 'z Patented Sept. 1 3, l

i iUNiITEJD STATES I 1,642,426 Peru-NT o Fine, I

' FRANK v. RIsIuGnn; ormnxnwoon, onto.

7 savanna-GRID AND rnoonss' on mnmmqqrnm snm.

.Application fileld October 513, 3925. 1 Serial No. 62;289;

-"llhepresent invention lTGliLtBSllOriL grid for gas burners anclthe process of snaking the same, and has for its ob ect primarily-(t prmzide in highly efficient grid which is of simple and substantial constructionend can be manufactured at ver-ysmall cost...

*EEurt-her objects of the invention are to provide a grid for gasburners which is :well adapted :for ;use..1n :conneotion W1th radlunt 10 :heaters,-wl1ic'h will ipr.oduce1a:higl1 temperzt- I combustion of ;the gas is produced andthe' radiantsqagre all heated :in-e uniform manner. l i I The invention also contemplates a novel 26 process of manufacturing the ,grids rby Ecutti-ng "or sawing slits in the edges lofimetatl bars :and {then assembling the metal bars in an edge to edge relation, so that the slits provide burner iopenings which hawe resub- 30 zstant-iully ;uniform cross section fromitop ito bottoinand do .not have enlarged or flared upper 'ends to produce fla ring :or spread- 'ing ofithe:flame. p v For ,a full (understanding of the invention irezference is to ibe had to the following-description and accompanying drawings, in which 7 l l iFig urejil is :anenlarged 'top ;plan view of one of a pair of complemental vgrid sections: --Fi,g.ure'2 i-san edge views thereof. igure-3 is a; plan viewofitwo of the;.c.om-- plementnl grid :sections intan assembled --1:elotion. Y i

grids therein. I f

with :the .grids in position therein.

igme 6 :is a sideelevation of the burners with :pontionszthereofbroken away and showndn'aseiction. H i V fliigune :7 "issue top plan wiewrthereof.

I fziguneifl *is zeghorizontal ;s ection9;l View -i-ropeningsfformed"aby the slits are substan- "lou -e'r end 1-01 the manifold A terminates in a circular-neck -h1ch i-saconnected by a couv Figured, is a perspective mew of i one end of the :chaaine'led mouth of the burner mani-- .fold showing :thetmanner, of fitting the through =t;he manifold section (of the burner, taken omthe iline-S-S of F igureifi. F gure 59 11s a top -plan ivievviofztheulo er" 7 section of theiburneiwcomprising the Bunsen tubeend themixingchamber, 7 w E gure :is ;a"vertioal sectional View through the :mixinglohamberpn the. line: l0-];',0-OZE i i Figure 1:1 is 28. transverse sectional View through the malniitol-d taken substantially 1011 the :llne 11--l l -Q:t"Figure-;6. i :Gorrespondnig and like parts are referred to -in the followingzdescription and, indicated on .n-llof {the views :of the drirwingsby like reference gcharaoters. v V .The grid off my invention is aadapted :to

beenip'loyed connection with-n rhu-rner such :as that which is illustrated by Figures,

6 to 10 inclusive of the :drawings. This burner lcompr-lses {a manifold A which flaresupwardly end :is provided at its upper end with {a marrow longitudinally extending channeled seat .13 within which the burner grid isifitted. 1 The side walls 1 of the Vmenifold i-haue ziispaced and substantially paraljust below :the :seat B .by ;the cross harsor webs 2 which are suitably threaded to re 1 ceive the: :grid instening screws, 3. The

, to a corresponding opening in the 1 top ofqthe mixing chamber D. o This mixing 1 chamber extends :rearwardly from the 1e11d-0 .the Bunsen tube E; The Bunsentube issoi v r a 'suitublelength .ztO insure a proper feeding -0f1the zairlaswthe gaspessesithrough the same.

The air zflIld gas :are given a swirling motion as rt'lieyrare directed .from the Bunsen tube into -.-the mixing chamber. This results in a 9 thorough mixing $01? :the :air and gas 'before they ,pass zupwairdly through the coupling g into the manifold .A.

Elhe {grid sis formed :insectionswhich are fitted iin the mhannel sshaped seat B of thoinofl V mani'iold- ,{tllCllSGQlM-Bd Tin {POSiblOIl therein by the screws Each section rof the grid is? divided" llongitudinailly into complementztl' strips 4, .one ofwhich issshown by Figure,-

-1. is (Sue edge :of 'the Y complemental sstrip has a :seaiies oi'xeonrparatiwely znarrow slits 5 .saw ed ior :otlierwisewut therein, :the inner" ends of the :slits .beingasubstuntia'lly parallel ztO sthe irear edges sof ztheistrips so sthat-the J d 580 Y 'lel relation and :are connected at intervals tially uniform in cross section from the top to the bottom of the Sll'll). The two nonipleinental strips l oil eaeh ridsection are assembled in an edge to edge relation with the slit edges thereof together and the slits are preferably :t'ornied in the strips in corresl'ionding positions so that the slits in the two strips register with eat-h other when the strips are assembled, The registering slits torn]. long and narrtnv burner openings which are nni'lorin in eross section. 't'roin the bottom of the grid to the top thereof, and which are suilieientl Y narrow to prevent any possihilitv oil baele'f ig. llheo the two eonin ileinental strips l are assembled, as shown by Figure 8, the grid section which is prodneed has a width eorres uniding to the Width of the ehannel shaped seat of the manifold so that it will tit hetireen the sid Wallso'l the seat and he held against lateral displacement thereby. the ends o t the strips 4- of the grid seetioini have the inner corners thereot provided with quarter eireular notrhes t) the lltittlitz; oil the two strips forming a sen1i-eireular opening adapted to receive the shanlr at one of the a rows in. The two staai-eirenlar notehes thus lornn-zd in the meeting ends of a pair ot the grid seetions PLOVlLlQ a circular opening to reeeivo the shank olt one oil the screws hen the screw is in po tion the head time of overhangs and enga i "h! strips ot the grid sections to hold the saute against longitudinal movement and ('ooperate with the side walls of the ehannel shaped seat ll to secure the grid *etioos in position.

Under some conditions it may be desirable to provide the meeting edges ol the eoinpleniental strips grid sections with oorrespomling slits adapted to reeeive dowel members 2:; to fasten the strips together. ll these dowel inenihors are llt acti. the two eoniplenilental strips l of each grid on are fastened together so that: the grid section is handled as a unit.

As shown by the dra'n'in it may also he desirable to provide their his or notches S in the outer edge elf one oi the eoinplen'iental strips l ojt each grid seetion,. said short slits being located at the ends oi? the strip and providing in elleet pilot lights tor pol-initting the lhnne to pass 't'roin one grid Hf rtion to another grid seetioin so that when a match is applied to the id at any point in the length thereo't, the flame will duielrl travel the full lo of the grid. The eross bars 2 oil the burner month have grooves 15 therein Wllltll tfll'fllitl under the notehes 8 to provide for a feeding oi gas thereto.

It :is essential in a burner grid that the slits have outlets Whieh are either smaller or substai'itiall the same size as the inlets, since with an outlet whit-h is linrger than the inlet there is a lateral spreading of the gas as it leaves the grid and this causes spreadrelates ing" ot the llaine. A. flaring or lengthening ot the grid slits at the upper ends thereof would he objectionable l'or this reason, and lor the best results it is desirable that the slits in the grid should have a substantially nnitorns cross '1 l'roni the hottoin to the top ol. the grid. Any lengthening of the slits at the top at the grid, as shown by l9atout l hji. l h-lthtiih whieh was granted on June :5, i015? to ll. A. Baxter, is IllltlCSll'fllJlG and results in objectionable :l'eatures which one of the ob ieets ol this iiwentitni to it h avoid.

'lhn grid sections have a substantial thielo noes ohieh is proterabl at least lour times the width ol' the ln'irner slits. This muses the mixture of gas and air to eontaet with the Walls ot the burner slits for a sligllt period oi' time hetero it passe;- grid into the eonilan tion zone.

(hn'ahle a not only prodoees a strong and through the tertions from metal hars ot subd hot also provides a grid which a eoinpriies a sullieient amount of metal to art in an elteetive manner to eondnet the heat oil the lhnne to the side walls of the manifold. (Wei-heatin ol the grid is thus prevented and bump-tiring rendered impossible.

l n nnunil'aeturing these grid sections the leaner slits are eat in the metal, preferably hr nieans oil a saw, and it will be obvious that it each hurner tihtftitill was an integral her it would be extremely ditlieult to saw the slits therein and have the ends of the slits l'itlli'lllol to the e' "as of the bar so that the slits would have a uniform cross see that from the top ot the bar to the bottom thereof. in order to meet this dillioulty and permit the slits to be formed by the sinipla and inei-zptnisive ex ualient o't' sawing the seine eaeh grid seetion is termed of eonipleinental st rips. It will be obvious that the slits 5 can he easily and quickly termed in the edges ol? the strips 4. by means of a sun. Ti lie method of making the grid sections a eordingly eoniprii-ces the steps of saw- .W the slits in the edges of the eoniplei'nental carame be" quickly manufactured gin llar'ge quantities at small cost, and-at the same t'imeka grid direct c entact iwith the' mstal of the grid so that there can'ibe n'o overheating thereof. iRe'feri-in g ate ":thel burner, the B'unsen tube E ii's shown as haying the end thereof flaredat'i9 to prov idean-air =in'let,'-the portion of the tube adjacent the zflared end being contracted in -theusual 1111111111915 The gas de. 1i-very nozzle is n'o't shown but enters the fia red' en'd of the Bunsen tube in the usual way. i ks the jet of gas passes through the.

Bunsen tube airis drawn in :through the flared earn in the iusual manner and the length of t he Bun'sentube issufficient to inand enter i the mixing chamber and manifold sure a steady intake of the required quantity It will be understood t hat with aof air. long tu'be therej is small possibility that the jetof gas-will pass down'one side of the tube without-drawing in a @supply of air in; the

required manner to cause perfect combus tlOIlL Thelmixling fchaniber is integral with the rear end of the Bunsen tubeE and is returned with respect thereto. The air and gas follow a curved end Wall as they enter the mixing chamber and are given a whirling motion which tends to produce a thorough mixture of the air and gas. The end of the mixing chamber D communlcates through an opening in the top thereof wit-h the lower end of the manifold A. A partition ex tends transversely across the outlet opening of the mixing chamber. Theupper strata of the. whirling mixture of air and gas in the mixing chamber is deflected upwardly by engagement with the partition 10 on one side thereof, while the lower strata of the air-andgas passes under thepartition and is deflected upwardly on the opposite side thereof by the end walls of the mixing chamber. V q

The contracted lower end of the manifold is detachably connected by the coupling C 'to the mixing chamber, being held in position thereon by suitable fastening members such as the screws 11. Them xture of air and gas passes upwardly into the lower end of the manifold intwo substantially equal streams on opposite sides of the partition 10. As the air and gas mixture rises in the manifold it is spread out and caused to enter the narrow flared chamber in the upper end thereof. Inord'er to prevent more of the air and gas from rising at the middle of the tion thereof thianat the ends. This provides a smaller space for-the upwardpassage oif the air and :gas at the middle of the manifold-than at-the-end portions thereof. The

space for the passage of the air and gas between the inner edges of the ribs gradually increases from the middle of the manifold.

toward the endsa hereof. These ribs thus tend to spread the :air and gas'l r lly-: that it @is' fed with substantial uniformity to the middle =ande1id' portions of the grid; A

sm ar substantially -un i form intensity is produced at all parts of :the grid andal"l of. the radi-ants ai-e heateduniformly. The constructi on of'the burner is such thata proper amount of air is -a-lways taken in by the gas and thoroughly mixed therewith by 'Lthe' whirling movement in' the mixing chamber D. Ifiirthermore the provision-bf the partition 10 andribs 12 results in a-uniform'feeding of the air and gas mixture 00 the-'grid at all points in the length thereof.

The upper end of the-manifold is "formed 7 withtiie channel shaped seatB which recerves the gr d SGC-UOIIS, sa1dggrid sections being securedto the end-s 0f the manifold and cross bars Qby t'he sorews ii. The construction of the grid sections, as previously described, issuch that they can be cheaply manufactured, quickly assembled, readily taken outand cleaned at any time, and permit the gaseous fuel to be burned in a highly efficient manner. V

The channel shaped seat B is open ended so that it can be readily out or-formed by simple tools which can pass through the open ends of the seat.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is,

1. The process of making a burnergrid which consists in placing a number of strips orbars together, forming a series of continuous slits in the edges of the bars, and then placing the slitted surfaces of the bars in contact so that registering slits'which formed portions of a continuous slit complement to provide a rectangular grid opening.

2. The process ofmaking a burner grid which consists in placing a number of metal bars in contact side by side, simultaneously cutting transversely across the surface of the bars a plurality of closelyrelated, narrow and continuous slits, then separating the'bars into pairs and placing the slitted edges of the bars in contact so that each pair of slitsv which formed a part of an aforesaid continuous slit register to form complemental portions of a narrow elongated grid openm p E. The process of making a burner grid which consists in placing a plurality of bars inside by side relation-and simultaneously cutting laterally into the bars a plurality of continuous parallel and narrow slits of uniform. cross section in opposing edges of the bars, and then disposing each of such strips in a channel in the burner body with the upper surlace of the strip substantially flush with the top of the channel and in such manner that the slits at one side coact with a wall of the channel to provide pilot burner openings and the slits at the other side pro- 'vide main burner openings.

4. A burner construction consisting of a grid comprising a pair of coinpleinental bars formed with n1atching-registrable slits to provide long and deep jets, said pairs being arranged side to side so that the pairs of identical slits register to form (OlllPlElllOlltttl portions of a grid opening, and a burner body on top of which the bars are seated with their upper sides substantially flush with the top or said body.

5. A. burner grid comprising a pair of eon'ipleinental strips having corresponding slits cut in tree edges thereof and assembled in an edge to edge relation with the slits ot the coinpleinental strips in registry with each other, each registering slit of one strip being identical in size and shape with the coinplemental slit of the other strip.

6. A burner grid comprising a plurality 0t coiuplelnental slits each of which has a plurality oil strips sawed in a free edge thereof, pairs of said strips bein assembled in an edge to edge relation, an dowel elements titted in certain of the slits to hold the coaeting strips together in a unit.

2'. A burner grid comprising a pairof eoniplenxental, elongated, rectangular strips which are similar in shape and interchangeable with each other, said strips being adapted to be assembled in an edge to edge relation and having a series of slits cut in the edges thereof, certain of said slits constituting main burner openings and others pilot openings.

b. A burner grid comprising a bar having burner openings therein and provided at an end thereof with notches providing openings for pilot lights.

2). .A burner grid comprising a strip having comparatively deep slits in an edge portion thereof forming inain burner openings, and also having shallow slits in the opposite edge lorniing openings for a pilot light.

in testimony whereof I afiix my signature.

liR-A'NK V. RISINGER. 

